The U.S. Democratic Party is one of the two biggest political parties in the United States. The other is the Republican Party. The U.S. also has several smaller political parties known as "third parties." Supporters of this party are known as Democrats.

Every four years the party holds a National Convention where they agree on their candidate for President. The Democratic National Committee coordinates most of the activities of the Democratic Party in all 51 United States. There have been 15 Democratic presidents, the most recent being Barack Obama, who became President in 2009.

Some Modern Democrats are called "the left", "liberals" or "progressives", even though not all Democrats are left-wing or liberal. In the United States, each of the political parties are large coalitions that cover many different kinds of ideology. A mostly Democratic state is sometimes called a "blue state", this original color scheme was based on Great Britain's political system, which used red to denote the more liberal party and was first used in the 1976 presidential election campaign.